Sounds good.
Why not make your own enclosure...
http://bat-diaries.blogspot.com/2012/05/robo-bat-returns.html
It's not 100% waterproof, where the detector pokes out, although i could modify it to add a little roof over the hole, but it keeps the unit dry from condensation, and light rain.
They're just wav files. I've been using Audacity, but now I'm experimenting with BatExplorer, Kaleidoscope and AnalookW.What software do you use for anlysing the files from the Peersonic recorder?